Wire-strapping tool



L. CAMPBELL.

WIRE .STRAPPING TOOL.

APPLICATION FILED JUNE 22, 1920.

Patented Oct. 10, 1922.

preliminarilyif'ormed parts earner OFFHCEQ LAYARD CAMPBELL, NEW YORK, N. Y., ASSIGNOR TO JOHN W. LESLIE AND JOHN LESLIE, BOTH OF CHICAGO, ILLINOIS.

WIRE-STBAPPING TOOL.

Application filed June 22,

To at 10 1mm it may concern lie it known that I, LAYARD CAMPBELL, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, county and State of New York, have invented certain new and useful Im rovements in Wire-Strapping Tools, of which the following is a full, clear, and exact description. Y

Among the principal objects which the present invention has in view are to perfect the sealto more securely. fasten the seal formed by the tool; to obviate the necessity for usiny pliers or other separate tools for cutting t e wire after the seal is made; and to shorten the time factor in the operation of making the seal.

I n I Draavin'gs. Figure 1 is a side elevation of a tool constructed-j in accordance'with the present invention g Figure 2 is a'to plan vlew of the same; Figure 3 is also emetic .view on reduced scale, indicatingthe' operative positions assumed-Eloy the tool at the initiation and completion of the operation-ofsealin when usingg-the tool" herein disclosed;v v Figured is across section, on enlarged scale, of the tool, thesection being taken as on the line a-iniigure 1 andshowin in addition in dotted-lines therelative posig tion which theconductor-C will-occupy when the device is in its'inverted position.

Figure 5-is aside elevation of the device" "in its inverted position showing how the binder is'raised off of-the package into aposition to be seized by the twisting apparatus.

V Description. The wire straps herein mentioned are -em-. ployed for reinforcing wooden boxes or other' packagesprincipally for transportation. The strap generally used is of the so-called bale wire type. hiszwire has a loop A, by returning a section of the wire upon itsel and twisting it in pos1tion. These wires are delivered in bundles, andapproxirnate in straight lengths the required dimensions.

In pra'ctlce the wire strap is passed around a carton'and the straight end is threaded through the loop A, the wire is drawn taut and the straight or threaded end is then bent back on the loop and, is usualh clipped or 1920. Serial No. 390,950.

the surplus wire cut away and the free end is tucked under the body of the wire adaccnt thereto to preventits beinp, dislocated to draw throiurh the loop. Several marhiucs have been perfected for accomplishingthis purpose; one such machine is described and claimed in an application for patent filed by me the 14th day of April, 1920, Serial No. 373,708, on an improvement in wire strapping tools, to which application cross reference is here made. The present 'tool is, in fact, an improvement upon the tool disclosed lnthe said application.

In the present tool the point 8 is bifurcated, as in the former tool, in advance of the studs 9. As in the former tool the studs 9 hold the loop A of the strap, while the free end B thereof is being drawn through the loop A, toti hten the strap on the carton or package- The free end is primarily held by adoc extended from the side of the take-up lever 12. The dog '10 has a serrated end which grips the wire and holds the same against the stud 13set out from the side of the lever 12. As disclosed'in the application referred to, the lever 12 is pivoted by the bolt 14 on the hand bar 15, and the hand bar 15 is body of the strap adjacent to the loop A, 00p

for the pur )ose of forming a second on-thefso-cailed free end of the wire. This loop when formed prevents the free of the wire from loosening or straiqhten ng out, so that there is no danger of pulling through the loop A. Also provision is made for severing the free end to rid the same of the surplus material which may result 10, 'which is pivoted on the pin 11 from the use-0f straps which are of over length. The wires are twisted primarily by means of a slotted gear pinion 18. The pinion 18 has a bearing in a bracket standard 19. which is made fast as by the bolt 20 to the fiattenegl section 16 of the bar 15. The flattened section 16 is bored to form aboaring for the beveled gear wheel 21 which 18 meshed with the pinion 18. A crank 22 is 110 employed for rotating the gear wheel 21, and the pinion 18. To this end the crank is furnished with the handle 23. As shown best in Figure 4 of the drawings, the slot 24 in the said pinion extends from the perimeter thereof past the center thereof. The distance to which the said slot is out past the said center is equal to one and one-half twisted.

The ratio between the pinion 18 and the wheel 21 is such that the pinion 21 is re 1 volved the necessary number of turns to the one complete revolution of the wheel 21, and the relation further provides that when the crank 22 is parallel with the bar 15, the slot 2a is perpendicular to the section 16 with the open end of the slot uppermost.- This is. the natural 1; osition for the crank 22 when the loop A of the strap is primarily placed between the studs 9. As the strap is'placed loosely in position on the package before the tool is brought into operation, the free end B is passed through the bifurcation in the point 8. As the free end is placed between the dog 10 and the stud 13 the body of the said free end naturally drops into the slot 24 in the pinion 18, and through the opening provided therefor at the upper edge of the bracket 19. With the wires so disposed, the lever 12 is shifted forward, rocking on the bolt 14 to engage the free end B as far forward as the operation suggests or permits. With the tool then braced against the loop A, and the loop A being held by the studs 9, the lever 12 is drawn back, the dog 10 gripping the wire, so that the full force of the lever is exerted to draw the free end B through the loop A, through the slot in the point 8, and through the slot 24 in the pinion 18, seating the wire firmly in the bottom of the said slot.

When the strap has been drawn suflicient- 1y tight the tool is turned over on the point 8. as shown in Figure 5 and also Figure 3 of the drawings, where the full line representation of the tool is the position assumed thereby when the wire has been tightened, and the broken lines inthe figure show the position assumed by the tool when overturned upon the point 8 and upon the rockers 25. Upon reversing the position of the tool. the point 8 passes under the loop 'A and the rockers 25 operate to lift the body of the strap from the package as shown in Figures 3 and 5 of the drawings, and dis- 7 pose the wire Within the slot 24;, when the end of the bracket 19 rests on the package.

It will now be observed that the handle,

23 of thecrank 22 is upturned, and in posiaetitia the handle 23, and revolves thereby the I wheel 21, and the pinion 18. As-the pinion 18 revolves, it picks up the body of the strap and draws the same to the center of the pinion 18, where it continues to remain while the free end B of the wire is being twisted thereabout. During threequarters of the first revolution of the pinion 18, the free end B is held taut by the dog 10, and the lever 12. During the further rotation of the pinion 18, the wire forming the free end B is severed by the cutter bar 26, the cutting edge 27 whereof is disposed in the path of the wire forming the free end B, and out of the path of the body wire C of the strap. The cutter bar 26 1s a square loop which is rigidly mounted upon the bracket 19.-

After-the surplus material of the free end B has been severed, the pinion 18 continuing to revolve, twists the remainder of the free end B about the body of the wire C, making a substantial and perfect seal, which is not in danger of becoming detached to pull through the loop A.

When the crank 22 has completed a cycle, and assumed its initial position, it will be found that the slot 24 is in sition to ermit the wire C and free end twisted a out the same to be delivered from the said pinion. The tool is then rocked back to'the position shown byfull lines in Figure 3 of the drawings, and the studs?) are drawn backward out of engagement with the loop A, the sealing of the strap having been com pleted.

As seen bent in Figure 2 of the drawings,

the hand bar 15 is offset from the lever 12 I by the bracket extension 28. The offset thus the stud 13 and dog lO when the lever 12 is disposed in juxtaposed parallel relation to the bar 15. While I have found the bar 15 a helpful feature, it is not essential to the complete operation of the tool. In some instances, it is preferred to sever the bar 15 adjacent the bolt 14, and between the said bolt and the offset bracket 28. It is found that the tool may be readily manipulated when using the crank 22 and the lever 12 for thispurpose. It is obvious that after the tool has been set to engage the loop A and free end B, the hand bar 15 performs almost no function that cannot as well be performed by the crank 22, to-wit, the over-turning of the tool to the position shown by broken lines in Figure 3 of the drawings.

Claims.

1. A tool as characterized comprising a rigid member for holding the looped endof I a bale wire; a pulling-member for engaging rigid the free end of the bale Wire; rotary means forengaging the free end when tightened and thebody portion of the Wire adjacent said 100p said rotary means, said means embodying a gear pinion having a radially disposed slot therein for holding said free end and body portion of said Wire during the rotation of said pinion; and means for severing said free end for eliminating the surplus Wire thereof, said means embodying the slot in said pinion and a shearing blade rigidly held in juxtaposed relation to the face of said pinion in the rotary path. of the Wire formingsaidfree end during the rotation of said plnion. Y

2. A tool as characterized comprisin a member for holding the looped enfof a bale. Wire; a pulling member for engaging for maintaining the parallel relation of'the said free end and body within the free end of the bale Wire; a rotary means for engaging the free end When tightened and the body portion of the Wire adjacent said loop for maintaining the parallel rela tion of the said free end and body Within saidrota-ry means, said means embodying a gear-pinion having a radially'disposed slot therein for holding said free end and body portion of said, Wire during the rotation of said pinion; and means for severing said free end for eliminating the surplus Wire thereof, said means. embodying a slot in said pinion, said slot extending from the periphery of said pinion past the rotary center thereof, a distance greater than the diameter of the said Wire, and a cutting implement stationarily disposed ,in juxtaposed relation to the face of said pinion in the rotary path of said free end when moved by said pinion. LAYARD CAMPBELL. 

